I got mine arround last thanksgiving.
I never got bitten, and it never been agressive.
I got it a 40 G tank with 3 hides (hot spot, cool spot + 1 one the middle)
I closed 3 sides of the tank with backgroung paper so the snake does not have the feeling to be in the middle of no where.
Bad experience : the undertank heating pad caused my tank to crack. I am guessing I will need to get a new tank soon